diff --git a/core/include/thread.h b/core/include/thread.h
index e3dc3ef8dc..6a1e6cfb71 100644
--- a/core/include/thread.h
+++ b/core/include/thread.h
@@ -356,7 +356,13 @@ kernel_pid_t thread_create(char *stack,
  * @param[in]   pid   Thread to retrieve.
  * @return      `NULL` if the PID is invalid or there is no such thread.
  */
-volatile thread_t *thread_get(kernel_pid_t pid);
+static inline volatile thread_t *thread_get(kernel_pid_t pid)
+{
+    if (pid_is_valid(pid)) {
+        return sched_threads[pid];
+    }
+    return NULL;
+}
 
 /**
  * @brief Returns the status of a process
diff --git a/core/thread.c b/core/thread.c
index 48bd2debbd..0c5f61f96c 100644
--- a/core/thread.c
+++ b/core/thread.c
@@ -30,14 +30,6 @@
 #include "bitarithm.h"
 #include "sched.h"
 
-volatile thread_t *thread_get(kernel_pid_t pid)
-{
-    if (pid_is_valid(pid)) {
-        return sched_threads[pid];
-    }
-    return NULL;
-}
-
 thread_status_t thread_getstatus(kernel_pid_t pid)
 {
     volatile thread_t *thread = thread_get(pid);